-
-
Notifications
You must be signed in to change notification settings - Fork 664
/
compilepkg.go
635 lines (594 loc) · 20.3 KB
/
compilepkg.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
// Copyright 2019 The Bazel Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// compilepkg compiles a complete Go package from Go, C, and assembly files. It
// supports cgo, coverage, and nogo. It is invoked by the Go rules as an action.
package main
import (
"bytes"
"context"
"errors"
"flag"
"fmt"
"io/ioutil"
"os"
"os/exec"
"path"
"path/filepath"
"sort"
"strings"
)
type nogoResult int
const (
nogoNotRun nogoResult = iota
nogoError
nogoFailed
nogoSucceeded
)
func compilePkg(args []string) error {
// Parse arguments.
args, _, err := expandParamsFiles(args)
if err != nil {
return err
}
fs := flag.NewFlagSet("GoCompilePkg", flag.ExitOnError)
goenv := envFlags(fs)
var unfilteredSrcs, coverSrcs, embedSrcs, embedLookupDirs, embedRoots, recompileInternalDeps multiFlag
var deps archiveMultiFlag
var importPath, packagePath, nogoPath, packageListPath, coverMode string
var outPath, outFactsPath, cgoExportHPath string
var testFilter string
var gcFlags, asmFlags, cppFlags, cFlags, cxxFlags, objcFlags, objcxxFlags, ldFlags quoteMultiFlag
var coverFormat string
var pgoprofile string
fs.Var(&unfilteredSrcs, "src", ".go, .c, .cc, .m, .mm, .s, or .S file to be filtered and compiled")
fs.Var(&coverSrcs, "cover", ".go file that should be instrumented for coverage (must also be a -src)")
fs.Var(&embedSrcs, "embedsrc", "file that may be compiled into the package with a //go:embed directive")
fs.Var(&embedLookupDirs, "embedlookupdir", "Root-relative paths to directories relative to which //go:embed directives are resolved")
fs.Var(&embedRoots, "embedroot", "Bazel output root under which a file passed via -embedsrc resides")
fs.Var(&deps, "arc", "Import path, package path, and file name of a direct dependency, separated by '='")
fs.StringVar(&importPath, "importpath", "", "The import path of the package being compiled. Not passed to the compiler, but may be displayed in debug data.")
fs.StringVar(&packagePath, "p", "", "The package path (importmap) of the package being compiled")
fs.Var(&gcFlags, "gcflags", "Go compiler flags")
fs.Var(&asmFlags, "asmflags", "Go assembler flags")
fs.Var(&cppFlags, "cppflags", "C preprocessor flags")
fs.Var(&cFlags, "cflags", "C compiler flags")
fs.Var(&cxxFlags, "cxxflags", "C++ compiler flags")
fs.Var(&objcFlags, "objcflags", "Objective-C compiler flags")
fs.Var(&objcxxFlags, "objcxxflags", "Objective-C++ compiler flags")
fs.Var(&ldFlags, "ldflags", "C linker flags")
fs.StringVar(&nogoPath, "nogo", "", "The nogo binary. If unset, nogo will not be run.")
fs.StringVar(&packageListPath, "package_list", "", "The file containing the list of standard library packages")
fs.StringVar(&coverMode, "cover_mode", "", "The coverage mode to use. Empty if coverage instrumentation should not be added.")
fs.StringVar(&outPath, "o", "", "The output archive file to write compiled code")
fs.StringVar(&outFactsPath, "x", "", "The output archive file to write export data and nogo facts")
fs.StringVar(&cgoExportHPath, "cgoexport", "", "The _cgo_exports.h file to write")
fs.StringVar(&testFilter, "testfilter", "off", "Controls test package filtering")
fs.StringVar(&coverFormat, "cover_format", "", "Emit source file paths in coverage instrumentation suitable for the specified coverage format")
fs.Var(&recompileInternalDeps, "recompile_internal_deps", "The import path of the direct dependencies that needs to be recompiled.")
fs.StringVar(&pgoprofile, "pgoprofile", "", "The pprof profile to consider for profile guided optimization.")
if err := fs.Parse(args); err != nil {
return err
}
if err := goenv.checkFlags(); err != nil {
return err
}
if importPath == "" {
importPath = packagePath
}
cgoEnabled := os.Getenv("CGO_ENABLED") == "1"
cc := os.Getenv("CC")
outPath = abs(outPath)
for i := range unfilteredSrcs {
unfilteredSrcs[i] = abs(unfilteredSrcs[i])
}
for i := range embedSrcs {
embedSrcs[i] = abs(embedSrcs[i])
}
if pgoprofile != "" {
pgoprofile = abs(pgoprofile)
}
// Filter sources.
srcs, err := filterAndSplitFiles(unfilteredSrcs)
if err != nil {
return err
}
// TODO(jayconrod): remove -testfilter flag. The test action should compile
// the main, internal, and external packages by calling compileArchive
// with the correct sources for each.
switch testFilter {
case "off":
case "only":
testSrcs := make([]fileInfo, 0, len(srcs.goSrcs))
for _, f := range srcs.goSrcs {
if strings.HasSuffix(f.pkg, "_test") {
testSrcs = append(testSrcs, f)
}
}
srcs.goSrcs = testSrcs
case "exclude":
libSrcs := make([]fileInfo, 0, len(srcs.goSrcs))
for _, f := range srcs.goSrcs {
if !strings.HasSuffix(f.pkg, "_test") {
libSrcs = append(libSrcs, f)
}
}
srcs.goSrcs = libSrcs
default:
return fmt.Errorf("invalid test filter %q", testFilter)
}
return compileArchive(
goenv,
importPath,
packagePath,
srcs,
deps,
coverMode,
coverSrcs,
embedSrcs,
embedLookupDirs,
embedRoots,
cgoEnabled,
cc,
gcFlags,
asmFlags,
cppFlags,
cFlags,
cxxFlags,
objcFlags,
objcxxFlags,
ldFlags,
nogoPath,
packageListPath,
outPath,
outFactsPath,
cgoExportHPath,
coverFormat,
recompileInternalDeps,
pgoprofile)
}
func compileArchive(
goenv *env,
importPath string,
packagePath string,
srcs archiveSrcs,
deps []archive,
coverMode string,
coverSrcs []string,
embedSrcs []string,
embedLookupDirs []string,
embedRoots []string,
cgoEnabled bool,
cc string,
gcFlags []string,
asmFlags []string,
cppFlags []string,
cFlags []string,
cxxFlags []string,
objcFlags []string,
objcxxFlags []string,
ldFlags []string,
nogoPath string,
packageListPath string,
outPath string,
outXPath string,
cgoExportHPath string,
coverFormat string,
recompileInternalDeps []string,
pgoprofile string,
) error {
workDir, cleanup, err := goenv.workDir()
if err != nil {
return err
}
defer cleanup()
// As part of compilation process, rules_go does generate and/or rewrite code
// based on the original source files. We should only run static analysis
// over original source files and not the generated source as end users have
// little control over the generated source.
//
// nogoSrcsOrigin maps generated/rewritten source files back to original source.
// If the original source path is an empty string, exclude generated source from nogo run.
nogoSrcsOrigin := make(map[string]string)
if len(srcs.goSrcs) == 0 {
// We need to run the compiler to create a valid archive, even if there's nothing in it.
// Otherwise, GoPack will complain if we try to add assembly or cgo objects.
// A truly empty archive does not include any references to source file paths, which
// ensures hermeticity even though the temp file path is random.
emptyGoFile, err := os.CreateTemp(filepath.Dir(outPath), "*.go")
if err != nil {
return err
}
defer os.Remove(emptyGoFile.Name())
defer emptyGoFile.Close()
if _, err := emptyGoFile.WriteString("package empty\n"); err != nil {
return err
}
if err := emptyGoFile.Close(); err != nil {
return err
}
srcs.goSrcs = append(srcs.goSrcs, fileInfo{
filename: emptyGoFile.Name(),
ext: goExt,
matched: true,
pkg: "empty",
})
nogoSrcsOrigin[emptyGoFile.Name()] = ""
}
packageName := srcs.goSrcs[0].pkg
var goSrcs, cgoSrcs []string
for _, src := range srcs.goSrcs {
if src.isCgo {
cgoSrcs = append(cgoSrcs, src.filename)
} else {
goSrcs = append(goSrcs, src.filename)
}
}
cSrcs := make([]string, len(srcs.cSrcs))
for i, src := range srcs.cSrcs {
cSrcs[i] = src.filename
}
cxxSrcs := make([]string, len(srcs.cxxSrcs))
for i, src := range srcs.cxxSrcs {
cxxSrcs[i] = src.filename
}
objcSrcs := make([]string, len(srcs.objcSrcs))
for i, src := range srcs.objcSrcs {
objcSrcs[i] = src.filename
}
objcxxSrcs := make([]string, len(srcs.objcxxSrcs))
for i, src := range srcs.objcxxSrcs {
objcxxSrcs[i] = src.filename
}
sSrcs := make([]string, len(srcs.sSrcs))
for i, src := range srcs.sSrcs {
sSrcs[i] = src.filename
}
hSrcs := make([]string, len(srcs.hSrcs))
for i, src := range srcs.hSrcs {
hSrcs[i] = src.filename
}
// haveCgo is true if the package contains Cgo files.
haveCgo := len(cgoSrcs)+len(cSrcs)+len(cxxSrcs)+len(objcSrcs)+len(objcxxSrcs) > 0
// compilingWithCgo is true if the package contains Cgo files AND Cgo is enabled. A package
// containing Cgo files can also be built with Cgo disabled, and will work if there are build
// constraints.
compilingWithCgo := haveCgo && cgoEnabled
// Instrument source files for coverage.
if coverMode != "" {
relCoverPath := make(map[string]string)
for _, s := range coverSrcs {
relCoverPath[abs(s)] = s
}
combined := append([]string{}, goSrcs...)
if cgoEnabled {
combined = append(combined, cgoSrcs...)
}
for i, origSrc := range combined {
if _, ok := relCoverPath[origSrc]; !ok {
continue
}
var srcName string
switch coverFormat {
case "go_cover":
srcName = origSrc
if importPath != "" {
srcName = path.Join(importPath, filepath.Base(origSrc))
}
case "lcov":
// Bazel merges lcov reports across languages and thus assumes
// that the source file paths are relative to the exec root.
srcName = relCoverPath[origSrc]
default:
return fmt.Errorf("invalid value for -cover_format: %q", coverFormat)
}
stem := filepath.Base(origSrc)
if ext := filepath.Ext(stem); ext != "" {
stem = stem[:len(stem)-len(ext)]
}
coverVar := fmt.Sprintf("Cover_%s_%d_%s", sanitizePathForIdentifier(importPath), i, sanitizePathForIdentifier(stem))
coverVar = strings.ReplaceAll(coverVar, "_", "Z")
coverSrc := filepath.Join(workDir, fmt.Sprintf("cover_%d.go", i))
if err := instrumentForCoverage(goenv, origSrc, srcName, coverVar, coverMode, coverSrc); err != nil {
return err
}
if i < len(goSrcs) {
goSrcs[i] = coverSrc
nogoSrcsOrigin[coverSrc] = origSrc
continue
}
cgoSrcs[i-len(goSrcs)] = coverSrc
}
}
// If we have cgo, generate separate C and go files, and compile the
// C files.
var objFiles []string
if compilingWithCgo {
// If the package uses Cgo, compile .s and .S files with cgo2, not the Go assembler.
// Otherwise: the .s/.S files will be compiled with the Go assembler later
var srcDir string
srcDir, goSrcs, objFiles, err = cgo2(goenv, goSrcs, cgoSrcs, cSrcs, cxxSrcs, objcSrcs, objcxxSrcs, sSrcs, hSrcs, packagePath, packageName, cc, cppFlags, cFlags, cxxFlags, objcFlags, objcxxFlags, ldFlags, cgoExportHPath)
if err != nil {
return err
}
gcFlags = append(gcFlags, createTrimPath(gcFlags, srcDir))
} else {
if cgoExportHPath != "" {
if err := ioutil.WriteFile(cgoExportHPath, nil, 0o666); err != nil {
return err
}
}
gcFlags = append(gcFlags, createTrimPath(gcFlags, "."))
}
// Check that the filtered sources don't import anything outside of
// the standard library and the direct dependencies.
imports, err := checkImports(srcs.goSrcs, deps, packageListPath, importPath, recompileInternalDeps)
if err != nil {
return err
}
if compilingWithCgo {
// cgo generated code imports some extra packages.
imports["runtime/cgo"] = nil
imports["syscall"] = nil
imports["unsafe"] = nil
}
if coverMode != "" {
if coverMode == "atomic" {
imports["sync/atomic"] = nil
}
const coverdataPath = "github.com/bazelbuild/rules_go/go/tools/coverdata"
var coverdata *archive
for i := range deps {
if deps[i].importPath == coverdataPath {
coverdata = &deps[i]
break
}
}
if coverdata == nil {
return errors.New("coverage requested but coverdata dependency not provided")
}
imports[coverdataPath] = coverdata
}
// Build an importcfg file for the compiler.
importcfgPath, err := buildImportcfgFileForCompile(imports, goenv.installSuffix, filepath.Dir(outPath))
if err != nil {
return err
}
if !goenv.shouldPreserveWorkDir {
defer os.Remove(importcfgPath)
}
// Build an embedcfg file mapping embed patterns to filenames.
// Embed patterns are relative to any one of a list of root directories
// that may contain embeddable files. Source files containing embed patterns
// must be in one of these root directories so the pattern appears to be
// relative to the source file. Due to transitions, source files can reside
// under Bazel roots different from both those of the go srcs and those of
// the compilation output. Thus, we have to consider all combinations of
// Bazel roots embedsrcs and root-relative paths of source files and the
// output binary.
var embedRootDirs []string
for _, root := range embedRoots {
for _, lookupDir := range embedLookupDirs {
embedRootDir := abs(filepath.Join(root, lookupDir))
// Since we are iterating over all combinations of roots and
// root-relative paths, some resulting paths may not exist and
// should be filtered out before being passed to buildEmbedcfgFile.
// Since Bazel uniquified both the roots and the root-relative
// paths, the combinations are automatically unique.
if _, err := os.Stat(embedRootDir); err == nil {
embedRootDirs = append(embedRootDirs, embedRootDir)
}
}
}
embedcfgPath, err := buildEmbedcfgFile(srcs.goSrcs, embedSrcs, embedRootDirs, workDir)
if err != nil {
return err
}
if embedcfgPath != "" {
if !goenv.shouldPreserveWorkDir {
defer os.Remove(embedcfgPath)
}
}
// Run nogo concurrently.
var nogoChan chan error
outFactsPath := filepath.Join(workDir, nogoFact)
nogoSrcs := make([]string, 0, len(goSrcs))
for _, goSrc := range goSrcs {
// If source is found in the origin map, that means it's likely to be a generated source file
// so feed the original source file to static analyzers instead of the generated one.
//
// If origin is empty, that means the generated source file is not based on a user-provided source file
// thus ignore that entry entirely.
if originSrc, ok := nogoSrcsOrigin[goSrc]; ok {
if originSrc != "" {
nogoSrcs = append(nogoSrcs, originSrc)
}
continue
}
// TODO(sluongng): most likely what remains here are CGO-generated source files as the result of calling cgo2()
// Need to determine whether we want to feed these CGO-generated files into static analyzers.
//
// Add unknown origin source files into the mix.
nogoSrcs = append(nogoSrcs, goSrc)
}
if nogoPath != "" && len(nogoSrcs) > 0 {
ctx, cancel := context.WithCancel(context.Background())
nogoChan = make(chan error)
go func() {
nogoChan <- runNogo(ctx, workDir, nogoPath, nogoSrcs, deps, packagePath, importcfgPath, outFactsPath)
}()
defer func() {
if nogoChan != nil {
cancel()
<-nogoChan
}
}()
}
// If there are Go assembly files and this is go1.12+: generate symbol ABIs.
// This excludes Cgo packages: they use the C compiler for assembly.
asmHdrPath := ""
if len(srcs.sSrcs) > 0 {
asmHdrPath = filepath.Join(workDir, "go_asm.h")
}
var symabisPath string
if !haveCgo {
symabisPath, err = buildSymabisFile(goenv, srcs.sSrcs, srcs.hSrcs, asmHdrPath)
if symabisPath != "" {
if !goenv.shouldPreserveWorkDir {
defer os.Remove(symabisPath)
}
}
if err != nil {
return err
}
}
// Compile the filtered .go files.
if err := compileGo(goenv, goSrcs, packagePath, importcfgPath, embedcfgPath, asmHdrPath, symabisPath, gcFlags, pgoprofile, outPath); err != nil {
return err
}
// Compile the .s files with Go's assembler, if this is not a cgo package.
// Cgo is assembled by cc above.
if len(srcs.sSrcs) > 0 && !haveCgo {
includeSet := map[string]struct{}{
filepath.Join(os.Getenv("GOROOT"), "pkg", "include"): {},
workDir: {},
}
for _, hdr := range srcs.hSrcs {
includeSet[filepath.Dir(hdr.filename)] = struct{}{}
}
includes := make([]string, len(includeSet))
for inc := range includeSet {
includes = append(includes, inc)
}
sort.Strings(includes)
for _, inc := range includes {
asmFlags = append(asmFlags, "-I", inc)
}
for i, sSrc := range srcs.sSrcs {
obj := filepath.Join(workDir, fmt.Sprintf("s%d.o", i))
if err := asmFile(goenv, sSrc.filename, packagePath, asmFlags, obj); err != nil {
return err
}
objFiles = append(objFiles, obj)
}
}
// Pack .o files into the archive. These may come from cgo generated code,
// cgo dependencies (cdeps), or assembly.
if len(objFiles) > 0 {
if err := appendFiles(goenv, outPath, objFiles); err != nil {
return err
}
}
// Check results from nogo.
nogoStatus := nogoNotRun
if nogoChan != nil {
err := <-nogoChan
nogoChan = nil // no cancellation needed
if err != nil {
nogoStatus = nogoFailed
// TODO: should we still create the .x file without nogo facts in this case?
return err
}
nogoStatus = nogoSucceeded
}
// Extract the export data file and pack it in an .x archive together with the
// nogo facts file (if there is one). This allows compile actions to depend
// on .x files only, so we don't need to recompile a package when one of its
// imports changes in a way that doesn't affect export data.
// TODO(golang/go#33820): After Go 1.16 is the minimum supported version,
// use -linkobj to tell the compiler to create separate .a and .x files for
// compiled code and export data. Before that version, the linker needed
// export data in the .a file when building a plugin. To work around that,
// we copy the export data into .x ourselves.
if err = extractFileFromArchive(outPath, workDir, pkgDef); err != nil {
return err
}
pkgDefPath := filepath.Join(workDir, pkgDef)
if nogoStatus == nogoSucceeded {
return appendFiles(goenv, outXPath, []string{pkgDefPath, outFactsPath})
}
return appendFiles(goenv, outXPath, []string{pkgDefPath})
}
func compileGo(goenv *env, srcs []string, packagePath, importcfgPath, embedcfgPath, asmHdrPath, symabisPath string, gcFlags []string, pgoprofile string, outPath string) error {
args := goenv.goTool("compile")
args = append(args, "-p", packagePath, "-importcfg", importcfgPath, "-pack")
if embedcfgPath != "" {
args = append(args, "-embedcfg", embedcfgPath)
}
if asmHdrPath != "" {
args = append(args, "-asmhdr", asmHdrPath)
}
if symabisPath != "" {
args = append(args, "-symabis", symabisPath)
}
if pgoprofile != "" {
args = append(args, "-pgoprofile", pgoprofile)
}
args = append(args, gcFlags...)
args = append(args, "-o", outPath)
args = append(args, "--")
args = append(args, srcs...)
absArgs(args, []string{"-I", "-o", "-trimpath", "-importcfg"})
return goenv.runCommand(args)
}
func runNogo(ctx context.Context, workDir string, nogoPath string, srcs []string, deps []archive, packagePath, importcfgPath, outFactsPath string) error {
args := []string{nogoPath}
args = append(args, "-p", packagePath)
args = append(args, "-importcfg", importcfgPath)
for _, dep := range deps {
args = append(args, "-fact", fmt.Sprintf("%s=%s", dep.importPath, dep.file))
}
args = append(args, "-x", outFactsPath)
args = append(args, srcs...)
paramsFile := filepath.Join(workDir, "nogo.param")
if err := writeParamsFile(paramsFile, args[1:]); err != nil {
return fmt.Errorf("error writing nogo params file: %v", err)
}
cmd := exec.CommandContext(ctx, args[0], "-param="+paramsFile)
out := &bytes.Buffer{}
cmd.Stdout, cmd.Stderr = out, out
if err := cmd.Run(); err != nil {
if exitErr, ok := err.(*exec.ExitError); ok {
if !exitErr.Exited() {
cmdLine := strings.Join(args, " ")
return fmt.Errorf("nogo command '%s' exited unexpectedly: %s", cmdLine, exitErr.String())
}
return errors.New(string(relativizePaths(out.Bytes())))
} else {
if out.Len() != 0 {
fmt.Fprintln(os.Stderr, out.String())
}
return fmt.Errorf("error running nogo: %v", err)
}
}
return nil
}
func createTrimPath(gcFlags []string, path string) string {
for _, flag := range gcFlags {
if strings.HasPrefix(flag, "-trimpath=") {
return flag + ":" + path
}
}
return "-trimpath=" + path
}
func sanitizePathForIdentifier(path string) string {
return strings.Map(func(r rune) rune {
if 'A' <= r && r <= 'Z' ||
'a' <= r && r <= 'z' ||
'0' <= r && r <= '9' ||
r == '_' {
return r
}
return '_'
}, path)
}